Results 81 to 90 of about 17,433 (317)

Experimental study on burning rate and flame geometry in construction tunnel fires under high geothermal conditions

Deep Underground Science and Engineering, EarlyView.
Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei, Maozhen Liu, Jiayi Ha, Linbo Du, Zhi Li, Yuhao Li, Chuangang Fan   +6 more
wiley   +1 more source

Carbody sway behaviour of railway vehicles due to track irregularity from rail alternate side wear

Railway Engineering Science
Track irregularity from rail alternate side wear is manifested as uneven rail wear waveforms alternating in the left and right rails with equal intervals, which will cause carbody sway behaviour of railway vehicles and greatly influences the passenger ...
Lai Wei, Jing Zeng, Ren Luo, Feng Gan, Jijun Gong, Jun Jiang   +5 more
doaj   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Multiagent Reinforcement Learning for Active Guidance Control of Railway Vehicles with Independently Rotating Wheels

Applied Sciences
This paper presents a novel data-driven multiagent reinforcement learning (MARL) controller for enhancing the running stability of independently rotating wheels (IRW) and reducing wheel–rail wear.
Juyao Wei, Zhenggang Lu, Zheng Yin, Zhipeng Jing   +3 more
doaj   +1 more source

Passenger Rail Service Comfortability in Kuala Lumpur Urban Transit System [PDF]

, 2016
Noor Hafiza Nordin, Mohd Idrus Mohd Masirin, Mohd Imran Ghazali, Muhammad Isom Azis   +3 more
openalex   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Research on Secondary Impact Safety of Train Driver based on THUMS Dummy

MATEC Web of Conferences, 2016
Based on biomechanical Total Human Model for Safety (THUMS) dummy and traditional rigid dummy, the train driver injury of secondary impact in railway crash events is analyzed and the results are compared.
Wang Wenbin, Ji Jiawei, Yue Zhitao, Zhang Dongdong, Tian Honglei, Zhao Hongwei   +5 more
doaj   +1 more source

Associations of land use around rail transit stations with jobs–housing distribution of rail commuters from smart-card data [PDF]

, 2022
Qingming Zhan, Yuqiu Jia, Zhenhua Zheng, Qi Zhang, Lei Luo   +4 more
openalex   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Analysis of the abnormal wear of the pantograph contact strip through combined experimental and simulation approaches

Scientific Reports
The carbon contact strip of pantograph collects current from the overhead catenary to power the train, inevitably causing wear to the contact surface. This paper addresses the abnormal wear of the pantograph carbon contact strip, a challenged accident ...
Xingshuai Zhi, Ning Zhou, Haifei Wei, Hongming Chen, Yao Cheng, Yi Sun, Langtao Zhao, Guanhua Huang, Weihua Zhang   +8 more
doaj   +1 more source